Keyphrases
- matrix factorization
- collaborative filtering
- recommender systems
- low rank
- nonnegative matrix factorization
- factorization methods
- online learning
- missing data
- negative matrix factorization
- factor analysis
- data matrix
- data sparsity
- item recommendation
- variational bayesian
- probabilistic matrix factorization
- stochastic gradient descent
- personalized ranking
- implicit feedback
- latent factors